intro to data journalism

Question 1

what is Data journalism

Answer 1

Data journalism or data-driven journalism (DDJ) is a journalistic process based on analysing and filtering large data sets for the purpose of creating or elevating a news story.

Question 2

what does data journalism help us do

Answer 2

The use of data journalism helps tell a complex story through the use of
infographics and data visualisations.

Question 3

what is visualization

Answer 3

Visualisation is communication of information using graphical representations

Question 4

the process of visualisation is to help us ______-

Answer 4

think

Question 5

Large data may require ______, ______ and ______-

Answer 5

sampling, filtering, aggregation

Question 6

2 ways to deal with missing data

Answer 6

interpolation, remove missing data

Question 7

what is visual mapping

Answer 7

Which visual representation to use

Question 8

what is view transformation

Answer 8

Mapping of the visual to the final presentation (dashboard, report)

Question 9

how is view transformation measured

Answer 9

expressiveness and effectiveness

Expressiveness => An expressive visualisation presents all the information, and only the information

Effectiveness => A visualisation is effective when it can be interpreted accurately and quickly

Question 10

what is Pre-Attentive Processing

Answer 10

-> No need to focus attention
-> You will notice whether you want to or not

Question 11

Why are Pre-Attentive Properties Important for Design of Visualisations

Answer 11

-> Can be perceived immediately
-> Can mislead viewer

Question 12

what are the pre-Attentive Processing attributes

Answer 12

color
shape
size
motion (direction)
spatial grouping
length
width
curvature
enclosure
blur

Question 13

why does using pre attentive processing attributes in conjunction have minimal impact.

Answer 13

there is minimal impact of data representation because the user will face difficulty in knowing what to focus on.

Question 14

what is Quantitative Perception

Answer 14

Quantitative perception refers to the ability to accurately perceive and measure quantitative aspects of visual stimuli, such as size, shape, color, and texture.

Question 15

what are the gestalt principles of perception

Answer 15

Closure
Proximity
Similarity
Continuity
Figure and Ground
Area and Symmetry

Question 16

what is closure

Answer 16

Closure occurs when an object is incomplete or a space is not completely enclosed.

If enough of the shape is indicated, people perceive the whole by filling in the missing information.

Question 17

what is proximity

Answer 17

When elements are placed close together, they tend to be perceived
as a group

Question 18

what is similarity

Answer 18

When objects look similar to one another., they are often perceived as
a group or pattern

Question 19

what is continuity

Answer 19

Continuation occurs when the eye is compelled to move through one
object and continue to another object

Question 20

what is Figure and Ground

Answer 20

The eye differentiates an object from its surrounding area. A shape is naturally perceived as figure (object), while the surrounding area is perceived as ground (background).

Question 21

what is Area and Symmetry

Answer 21

The principle of area states that the smaller of two overlapping figures is perceived as figure while the larger is regarded as ground.

The principle of the symmetrical figure is that it is seen as a closed figure.

Symmetrical contours thus define a figure and isolate it from its ground.

Question 22

2 main types of data

Answer 22

quantitative
qualitative

Question 23

types of quantitative data

Answer 23

discrete
continuous

Question 24

types of qualitative data

Answer 24

nominal
ordinal

Question 25

what are some no distortion rules for data visualization

Answer 25

–> 3 dimensional effects
–> non linear data scaling (its ok for length but not for area)
–> truncated graph

Question 26

human can differentiate between how many colours ?

Answer 26

8